Gage-chisel for cutting hinge-recesses



(No Model.) I

A. T. BINKERD.

GAGE CHISEL FOR CUTTING HINGE REGESSBS.

No. 893,880. Patented Dec. 4, 1888.

I i Z "B I WITNES INVENTOR:

ATTORNEYS.

UNITE STATES PATENT OFFICE.

AARON THOMAS BINKERD, OF ALLEGHENY, ASSIGNOR TO DUNCAN C. \VHITE, OFPITTSBURG, PENNSYLVANIA.

GAGE-CHISEL FOR CUTTING HlNGE-RECESSES.

SPECIFICATION forming part of Letters Patent No. 393,880, dated13222.11: 2: 4, 1888.

Application filed March 16, 1888. Serial No. 267,331. (No model.)

To all whom it may concern.-

Be it known that I, AARON THOMAS BINK- ERD, of Allegheny, in the countyof Allegheny and State of Pennsylvania, have invented a new and lmprored Gage-Chisel for Cutting Hinge-Recesses, of which the following is afull, clear, and exact description.

My invention relates to a tool adapted more particularly for scoring orcutting recesses to receive the leaves of butt or other hinges, and hasfor its object to provide a simple, inexpensive, and efficient tool ofthis class, by the aid of which hinges of any size may be quickly,easily, and neatly set into work and without the aid of compass,try-square, or ordinary marking-gages.

The invention consists in certain novel features of construction andcombinations of parts of the gage-chisel, all as hereinafter describedand claimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation of my improved gage-chisel, and shows alsoa portion of the edg'ej of a door or other structure into which recessesare to be cut by the chisel to receive hinges. Fig. 2 is awiew taken atright angles to Fig. 1 and with the chisel head partly broken away andin section, and Fig. 3 is a view of the tool at its cutting-face.

The gage-chisel is made with a metal stock, A, having a. square orrectangular lower or outer end portion or head, a, to which the cuttersare fixed, as presently explained, and is provided with a suitablehandle, B, affording a firm grasp of the tool by one hand while thehandle is struck by a hammer in operating the tool.

The chisel-cutters C D E are held by screws 0 d 6, respectively, tothree sides or faces of the stock-head a, and so that theircuttingedges, which are sharpened from the inner faces of the cutters,stand at right angles to each other and in the same plane, and with onemitered or beveled side edge of the cutters D E meeting the-oppositemitered or beveled side edges of the cutter C in a manner to cause thetool to make a clean cut or incision having an angular or rectangularoutline as it is forced or pressed to the work. \Vasherplates or washersc d 6 may be used under the heads of the screws 0 (l e, if preferred.

In the end of the stock-head (L, and within lugs H H of the gage-platesto be set so that their gaging faces or shoulders h 71 stand therequired distance back of the face of the chisel-cutter C, and thesegage-plates G are preferably provided with a graduated scale, I,

by which the plates maybe placed with refer once to a fixed mark orindex-line, J, on the tool-stock to allow the gage-plates to be setaccurately without using a rule or other measure for the purpose.

In using this tool the gage-plates G will be 75 set so that theirshoulders It will stand at the same distance from the outer face of thecutter C as the butt or other hinge is to be inserted edgewise into thedoor K from the door-face It, and the screw F will be set back from thesharp edges of the cutters a distance equaling the thickness of the leafof the hinge. The hinge will now be laid onto the door and two markswill be madeone at each end of the hingeand one of the cutters, D or E,will be 8 5 held at one of these marks, while the gageplate shoulders hare held to the face k of the door, and the tool will be struck a sharpblow or pressed into. the wood as far as the gagescrew F will allow, andthen will be lifted and set along toward the other end mark of the hingea little distance, and will be again struck into the wood,-and so onuntil all the wood which is to be removed to form the hinge-recess isscored or cut, and the cutter D or E 5 opposite the one used at thefirst end mark of the hinge will be set at the other end mark, whereuponthe final blow or pressure will be given the tool, and the wood whichhad been out or scored by the tool, as above described, 10

The same screws d 60 Having thus described my invention, what i I claimas new, and desire to secure by Letters Patent, is-

l. A gage-chisel made with a stock, a cntt'er or cutters held theretoand making an ang gulal' score or incision, a plate or plates held l tothe stock to gage the wm'king of the cut 5 ters laterally, and aset-screw titted to the stock and within the angle described by thecutters and to gage their working depth, substantially as herein setforth. l

2. A gage-chisel made with a stock, a cutter or cutters held thereto andmaking an angular score or incision, a plate or plates held adjustablyto the stock to gage for any required lateral working of the cutters,and a set-screw fitted to the stock and within the angle described bythe cutters and to gage their working depth, substantially, as hereinset forth.

3. The combination, in a gage-chisel, of a stock, A, having a squaredhead, (I, cutters (I l) E, held to three sides of the head, a gagescrew,I at the end oi." the stock and between the cutters, and a gage plateorplates, G,held 3 adjustably to the stock and provided with a shoulder,11, all constructed and arranged for operation substantially as hereinset forth.

FRANK R. LIGGETT, ARTHUR \VEssEL.

